Mbewu zobiriwira zimathiriridwa pothira madzi pamwamba pa nthaka pogwiritsa ntchito machubu kapena matepi otayira madzi, pogwiritsa ntchito payipi, zothirira pamwamba ndi ma booms kapena pothira madzi pansi pa chidebe kudzera mu kuthirira pansi, kapena pogwiritsa ntchito njira zosiyanasiyana zoperekera madzi. Zothirira pamwamba ndi kuthirira m'manja zimakhala ndi chizolowezi "chowononga" madzi ndikunyowetsa masamba, zomwe zimawonjezera kuthekera kwa matenda ndi kuvulala. Njira zothirira pansi ndi kuthirira pansi ndizomwe zimagwira ntchito bwino kwambiri ndipo zimapereka ulamuliro waukulu pa kuchuluka kwa madzi omwe amagwiritsidwa ntchito. Komanso, popeza masamba sanyowa, pali kuthekera kochepa kwa matenda ndi kuvulala.